Add initial typescript config and use it for eslint,vitest,playwright (#31186)

This enables eslint to use the typescript parser and resolver which
brings some benefits that eslint rules now have type information
available and a tsconfig.json is required for the upcoming typescript
migration as well. Notable changes done:

- Add typescript parser and resolver
- Move the vue-specific config into the root file
- Enable `vue-scoped-css/enforce-style-type` rule, there was only one
violation and I added a inline disable there.
- Fix new lint errors that were detected because of the parser change
- Update `i/no-unresolved` to remove now-unnecessary workaround for the
resolver
- Disable `i/no-named-as-default` as it seems to raise bogus issues in
the webpack config
- Change vitest config to typescript
- Change playwright config to typescript
- Add `eslint-plugin-playwright` and fix issues
- Add `tsc` linting to `make lint-js`

playwright.config.ts

@@ -0,0 +1,98 @@
+import {devices} from '@playwright/test';
+import {env} from 'node:process';
+import type {PlaywrightTestConfig} from '@playwright/test';
+
+const BASE_URL = env.GITEA_URL?.replace?.(/\/$/g, '') || 'http://localhost:3000';
+
+export default {
+  testDir: './tests/e2e/',
+  testMatch: /.*\.test\.e2e\.ts/, // Match any .test.e2e.ts files
+
+  /* Maximum time one test can run for. */
+  timeout: 30 * 1000,
+
+  expect: {
+
+    /**
+     * Maximum time expect() should wait for the condition to be met.
+     * For example in `await expect(locator).toHaveText();`
+     */
+    timeout: 2000,
+  },
+
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: Boolean(env.CI),
+
+  /* Retry on CI only */
+  retries: env.CI ? 2 : 0,
+
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: env.CI ? 'list' : [['list'], ['html', {outputFolder: 'tests/e2e/reports/', open: 'never'}]],
+
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    headless: true,   // set to false to debug
+
+    locale: 'en-US',
+
+    /* Maximum time each action such as `click()` can take. Defaults to 0 (no limit). */
+    actionTimeout: 1000,
+
+    /* Maximum time allowed for navigation, such as `page.goto()`. */
+    navigationTimeout: 5 * 1000,
+
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    baseURL: BASE_URL,
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+
+    screenshot: 'only-on-failure',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+
+      /* Project-specific settings. */
+      use: {
+        ...devices['Desktop Chrome'],
+      },
+    },
+
+    // disabled because of https://github.com/go-gitea/gitea/issues/21355
+    // {
+    //   name: 'firefox',
+    //   use: {
+    //     ...devices['Desktop Firefox'],
+    //   },
+    // },
+
+    {
+      name: 'webkit',
+      use: {
+        ...devices['Desktop Safari'],
+      },
+    },
+
+    /* Test against mobile viewports. */
+    {
+      name: 'Mobile Chrome',
+      use: {
+        ...devices['Pixel 5'],
+      },
+    },
+    {
+      name: 'Mobile Safari',
+      use: {
+        ...devices['iPhone 12'],
+      },
+    },
+  ],
+
+  /* Folder for test artifacts such as screenshots, videos, traces, etc. */
+  outputDir: 'tests/e2e/test-artifacts/',
+  /* Folder for test artifacts such as screenshots, videos, traces, etc. */
+  snapshotDir: 'tests/e2e/test-snapshots/',
+} satisfies PlaywrightTestConfig;